Space'sX CRS-21 Cargo Dragon returned to Earth from the ISS today, January 13, 2021, splashing down off the coast of Florida for the first time ever. The ship also succeeded in the first-ever autonomous undocking.

Happy Julian New Year! January 13, 2021, marks the last day of the year in the old-style Julian calendar. Why, and what happened when the calendars switched.

New work agrees with older research suggesting the oldest light in the universe - from the most distant galaxy yet known - started its journey toward us 13.77 billion years ago.

Last year, the U.S. experienced a record-smashing 22 weather and climate disasters that killed at least 262 people and injured scores more. Damages exceeded $1 billion each and totaled approximately $95 billion for all 22 events.

Astronomers have obtained one of the best images yet of a brown dwarf, an object in a mass range midway between stars and planets. This brown dwarf - called HD 33632 Ab - lies 86 light-years from our sun.

Joe Biden is the United States presidential election winner, but his plans for NASA remain unclear. And while citizens digest the election results, the space industry is left wondering what comes next.

Forty years of satellite data show that 2020 was just the latest in a decades-long decline of Arctic sea ice.

Popocatépetl volcano near Mexico City has been erupting since January 2005. On January 6, Mexico’s National Center for Prevention of Disasters, which continuously monitors the volcano, warned people not to approach due to an outburst that caused falling ash and rock fragments.

The Age of Aquarius may be said to begin when the vernal equinox point moves in front of Aquarius. But when will that be?

See a whole year of sun images, an image a day for 2020, taken by ESA's Proba-2 satellite.